Connection Procedures - GRAPHTEC GL840 Quick Start Manual

Connecting the AC Adapter
Connect the DC output of the AC adapter to the
connector indicated as "DC LINE" on the GL840.
Making Connections to the Analog Input Terminals
< Screw terminal >
CH1................................CH20.
CAUTION: Connect wires to the specified channel, the channel number is shown on top of the terminal block.
For the connection to the screwless terminal, refer to the instruction manual (PDF).
Making Connections to the External Input/Output Terminals
* The B-513 input/output cable for GL (sold separately) is required for connecting input/output signals.
(For logic/pulse input, alarm output, trigger input, external sampling pulse input)
3

Connection Procedures

+
-
b
< Signal assignment >
Connecting the Grounding Cable
Use a flathead screwdriver to push the button above
the GND terminal while connecting the grounding
cable to the GL840. Connect the other end of the
cable to ground.
DC voltage input
+
DC voltage
-
Resistance bulb input
A
+
B
-
b
b
Lead wire resistance should be
10 Ω or less per wire, three
wires need to be same length.
Thermocouple input
Compensation wire is
used if it is required.
DC current input
+
-
Shunt resister
Ex: For 4-20mA, add 250Ω (±0.1%) and measure
in the 1-5V range.
* Use B-551 (option) for the shunt resistor.
(Option: When using B-513)
Orange with red dotted line : 1
Orange with black dotted line : 2
Grey with red dotted line : 3
Grey with black dotted line : 4
White with red dotted line : 1
White with black dotted line : 2
Yellow with red dotted line : 3
Yellow with black dotted line : 4
Pink with red dotted line : Trigger input/
external sampling input
Pink with black dotted line
Shielded
+
-
Logic/pulse
input
Alarm output
GND